连接UISlider到fontSize的实现方法

我理解的你是要从两种字体中选择，这样可以把字体放在一个NSString中实现，然后
.h

@interface ViewController : UIViewController
{
    IBOutlet UISlider* fontSizeSlider;
    IBOutlet UITextView* textView;
    NSString *currentFont;
}
-(IBAction)sliderValueChanged:(UISlider*)sender;
-(IBAction)font1;
-(IBAction)font2;
@end

.m

-(void)viewDidLoad {
    [super viewDidLoad];
    currentFont = @"Heiti TC"; //Or whatever your default font is
    textView.font = [UIFont fontWithName:currentFont size:sender.value];
}
-(IBAction)sliderValueChanged:(UISlider*)sender
{
   textView.font = [UIFont fontWithName:currentFont size:sender.value];
}

-(IBAction)font1{
   currentFont = @"Heiti TC";
   textView.font = [UIFont fontWithName:currentFont size:fontSizeSlider.value];
}

-(IBAction)font2{
   currentFont = @"Marker Felt";
   textView.font = [UIFont fontWithName:currentFont size:fontSizeSlider.value];
}